PS02-Sol

# PS02-Sol - Genetics 320 Problem Set Two Solutions 1(1 point...

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Genetics 320 Problem Set Two Solutions 1 (1 point) : A pure-breeding red ﬂower line is crossed with a pure-breeding white ﬂower line. All the F1 individuals are green, while the F2 shows red, white, and green ﬂowered-individuals. Crossing red and green individuals gives equal numbers of red and green-ﬂowered offspring. Crossing white and green individuals gives equal numbers of white and green-ﬂowered off- spring. What genetic model accounts for these observations (i.e., give the genotypes and their corresponding phenotypes)? RR = red, RW = green, WW = white 2 (1 point) : U of A scientists studying life on mars found that there are three sexes, with each contributing one allele at random to its offspring. The genotype sss gives the dreaded sundevil phenotype. If the three parents are SSs , sSS , and Sss : (a) What is the probability an offspring shows the sundevil phenotype? (1/3)(1/3)(2/3) = 2/27 (b) What is the probability an SSS offspring? (2/3)(2/3)(1/3) = 4/27 (c) What is the probability an SSs offspring? Pr(s from P1) + Pr(s from P2) + pr (s from P3) = (1/3)(2/3)(1/3) + (2/3)(1/3)(1/3) + (2/3)(2/3)(2/3) 3 (1 point) :

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## This homework help was uploaded on 04/03/2008 for the course BIO 320 taught by Professor Walsh,weinert during the Fall '07 term at Arizona.

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PS02-Sol - Genetics 320 Problem Set Two Solutions 1(1 point...

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